One of those is a returned traveller in hotel quarantine.
The other three are all healthcare workers, linked to another staff member who worked at the emergency departments in Concord Repatriation General Hospital and Liverpool Hospital.
A number of healthcare workers at Concord Repatriation General Hospital have contracted coronavirus. (Kate Geraghty)
One worked at Concord ED 7am-7pm on September 1 while potentially infectious. The other two healthcare workers worked at Liverpool ED on September 2, 3, and 4.
The three newly reported health workers reported having no symptoms while at work and wore personal protective equipment while caring for patients.
One of today’s new coronavirus cases contracted the virus while wearing a face mask, NSW Premier Gladys Berejiklian said.
She said masks are just “one part” of the fight against the disease and this should serve as a reminder of how contagious it is.
Dr Kerry Chant said an investigation is underway into how the virus was contracted while a worker was wearing a surgical mask and full protective gear.
“Were obviously very keen to look at how transmission occurred in these settings,” Dr Chant said.
“I think this just highlights the fact that there could be fomite transmission.”
Fomite transmission means the virus could have been contracted from a surface or object.
“What that means in lay terms is if your hands are contaminated and then you’re touching computer screens, or touching pens and pencils, pieces of paper, can you actually transmit the virus,” Dr Chant said, adding “it is actually very hard to never touch your face” and there a number of ways the virus can enter the body.
She reminded people that it is safe to visit hospitals and emergency departments.
Four healthcare workers across Concord and Liverpool EDs have now tested positive for COVID-19, NSW Health said.
A visitor to a patient at Concord emergency department has also tested positive overnight and will be recorded in tomorrow’s figures.
There were 10,129 tests carried out in the last day.
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